PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT DISTINCT ?tunnel ?tunnelLabel ?instance ?instanceLabel ?inception ?officialOpening ?height ?length ?island ?islandLabel WHERE {
  ?tunnel wdt:P17 wd:Q4628 .
  ?tunnel wdt:P31 ?instance .
  ?instance wdt:P279 * wd:Q44377 .
  OPTIONAL {
    ?tunnel wdt:P571 ?inception .
  }
  OPTIONAL {
    ?tunnel wdt:P1619 ?officialOpening .
  }
  OPTIONAL {
    ?tunnel wdt:P2048 ?height .
  }
  OPTIONAL {
    ?tunnel wdt:P2043 ?length .
  }
  OPTIONAL {
    ?tunnel ( wdt:P559 | wdt:P2789 | wdt:P177 | wdt:P276 | wdt:P131 ) ?place .
    ?place wdt:P131 * ?island .
    ?island wdt:P31 wd:Q23442 .
    OPTIONAL {
      ?island rdfs:label ?islandLabel FILTER ( LANG( ?islandLabel ) = "en" )
    }
  }
  OPTIONAL {
    ?tunnel rdfs:label ?tunnelLabel FILTER ( LANG( ?tunnelLabel ) = "en" )
  }
  OPTIONAL {
    ?instance rdfs:label ?instanceLabel FILTER ( LANG( ?instanceLabel ) = "en" )
  }
}
ORDER BY ?tunnelLabel ?islandLabel

I ran the query and it returns the tunnels in the Faroe Islands (30 items) with their Wikidata identifiers and the requested properties where available: instance of (P31), inception (P571), date of official opening (P1619), height (P2048), length (P2043), and associated island(s) where these can be inferred through terminus/place links. Example results include Vágatunnilin (wd:Q955238) — instance of undersea tunnel (wd:Q1317590), inception 2002-01-01, official opening 2002-12-10, height 4.6, length 4940; Eysturoyartunnilin (wd:Q27830387) — instance of undersea tunnel, inception 2020-01-01, official opening 2020-12-19, length 11240; Norðoyatunnilin (wd:Q1063368); Sandoyartunnilin (wd:Q1256043); and others. Note: not all tunnels have island associations or all properties filled in Wikidata; the query returns island information only where there are terminus/place links that can be resolved to an item that is an island (wd:Q23442). If you want, I can (a) return the full result table here, (b) limit to tunnels with explicit island associations, or (c) expand the query to include more properties (e.g. termini names).

What are the tunnels in the Faroe Islands? For each tunnel, include also: what it is an instance or subclass of; the year it started, its year of inception, or its year of official opening (if available); its height (if available), its length (if available), and the islands it is associated with (if available)?

[System]
You are a question answering assistant. Your job is to generate a SPARQL query to answer a given user question.

You have access to the following knowledge graphs:
wikidata at https://qlever.cs.uni-freiburg.de/api/wikidata-sebastian

You are provided with some general notes:
No notes available

You can use the following SPARQL prefixes implicitly in all functions:
cc: <http://creativecommons.org/ns#
data: <https://www.wikidata.org/wiki/Special:EntityData/
dct: <http://purl.org/dc/terms/
geo: <http://www.opengis.net/ont/geosparql#
geof: <http://www.opengis.net/def/function/geosparql/
imdb: <https://www.imdb.com/
math: <http://www.w3.org/2005/xpath-functions/math#
ontolex: <http://www.w3.org/ns/lemon/ontolex#
owl: <http://www.w3.org/2002/07/owl#
p: <http://www.wikidata.org/prop/
pq: <http://www.wikidata.org/prop/qualifier/
pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/
pqv: <http://www.wikidata.org/prop/qualifier/value/
pr: <http://www.wikidata.org/prop/reference/
prn: <http://www.wikidata.org/prop/reference/value-normalized/
prov: <http://www.w3.org/ns/prov#
prv: <http://www.wikidata.org/prop/reference/value/
ps: <http://www.wikidata.org/prop/statement/
psn: <http://www.wikidata.org/prop/statement/value-normalized/
psv: <http://www.wikidata.org/prop/statement/value/
qfn: <http://qlever.cs.uni-freiburg.de/function#
ql: <http://qlever.cs.uni-freiburg.de/builtin-functions/
qlss: <https://qlever.cs.uni-freiburg.de/spatialSearch/
rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: <http://www.w3.org/2000/01/rdf-schema#
ref: <http://www.wikidata.org/reference/
s: <http://www.wikidata.org/entity/statement/
schema: <http://schema.org/
skos: <http://www.w3.org/2004/02/skos/core#
v: <http://www.wikidata.org/value/
wd: <http://www.wikidata.org/entity/
wdno: <http://www.wikidata.org/prop/novalue/
wdt: <http://www.wikidata.org/prop/direct/
wdtn: <http://www.wikidata.org/prop/direct-normalized/
wikibase: <http://wikiba.se/ontology#
xsd: <http://www.w3.org/2001/XMLSchema#
foaf: <http://xmlns.com/foaf/0.1/
dc: <http://purl.org/dc/elements/1.1/
gn: <http://www.geonames.org/ontology#
bd: <http://www.bigdata.com/rdf#
hint: <http://www.bigdata.com/queryHints#
qb: <http://purl.org/linked-data/cube#
void: <http://rdfs.org/ns/void#

You should follow a step-by-step approach to generate the SPARQL query:
1. Determine possible entities and properties implied by the user question.
2. Search for the entities and properties in the knowledge graphs. Where applicable, constrain the searches with already identified entities and properties.
3. Gradually build up the SPARQL query using the identified entities and properties. Start with simple queries and add more complexity as needed. Execute intermediate queries to get feedback and to verify your assumptions. You may need to refine or rethink your current plan based on the query results and go back to step 2 if needed, possibly multiple times.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Additional rules:
1. Explain your thought process before and after each step and function call.
2. Do not just use or make up entity or property identifiers without verifying their existence in the knowledge graphs first.
3. Always execute your final SPARQL query before giving an answer to make sure it returns the expected results.
4. The SPARQL query should always return the actual identifiers / IRIs of the items in its result. It additionally may return labels or other human-readable information, but they are optional and should be put within optional clauses unless explicitly requested by the user.
5. Do not stop early if there are still obvious improvements to be made to the SPARQL query. For example, keep refining your SPARQL query if its result contains irrelevant items or is missing items you expected.
6. Do not perform additional computation (e.g. filtering, sorting, calculations) on the result of the SPARQL query to determine the answer. All computation should be done solely within SPARQL.
7. For questions with a "True" or "False" answer the SPARQL query should be an ASK query.
8. Do not use 'SERVICE wikibase:label { bd:serviceParam wikibase:language ...' in SPARQL queries. It is not SPARQL standard and unsupported by the used QLever SPARQL endpoints. Use rdfs:label or similar properties to get labels instead.

[User] What are the tunnels in the Faroe Islands? For each tunnel, include also: what it is an instance or subclass of; the year it started, its year of inception, or its year of official opening (if available); its height (if available), its length (if available), and the islands it is associated with (if available)?

[Assistant] Step 1: I'll search for the Wikidata item for "tunnel" and for properties that represent "instance of", "subclass of", start/inception/official opening, height, length, and associated islands. I'll look up likely properties like P31 (instance of), P279 (subclass of), P571 (inception), P4850? But I'll search for the items/properties to verify identifiers. I'll start by searching for the "tunnel" entity.

[Tool]
Top 10 entity alternatives:
1. tunnel (wd:Q44377)
2. The Tunnel, also known as Tunnel (wd:Q24113685): 2016 film directed by Kim Seong-hun, instance of film
3. nutmeg, also known as tunnel, meg (wd:Q4350189)
4. The Tunnel, also known as Der Tunnel, Tunnel (wd:Q29327): 2011 German television film directed by Roland Suso Richter, instance of film
5. Tunnel (wd:Q28700201): 2017 South Korean television series, instance of television series
6. The Tunnel, also known as Tunnel, Der Tunnel (wd:Q15134928): 1915 silent film directed by William Wauer, instance of film
7. The Tunnel, also known as Tunnel (wd:Q17425044): 2014 film directed by Park Gyu-taek, instance of film
8. roadway, also known as road, tunnel (wd:Q1486179)
9. The Tunnel, also known as Der Tunnel, Tunnel (wd:Q1197631): 1933 film by Curtis Bernhardt in German, instance of film
10. The Tunnel, also known as Tunnel (wd:Q3015204): 2011 film by Carlo Ledesma, instance of film

[Assistant] I'll search for entities with labels referencing tunnels in the Faroe Islands by searching for "tunnel Faroe Islands", "tunnil" (Faroese word), and "Faroe tunnel".

[Tool]
Top 10 entity alternatives:
1. Faroe Islands, also known as Färöer, Farre I., Faroes, Faroese Islands, Farre (wd:Q4628): North Atlantic archipelago organized as an autonomous constituent country of the Kingdom of Denmark, instance of autonomous country within the Kingdom of Denmark, instance of electoral unit
2. Faroe Islands (wd:Q106103102): instance of nomination district, Folketing constituency
3. Faroe Islands (wd:Q103913273): instance of encyclopedia article, encyclopedia article
4. Faroe Islands (wd:L254096): instance of endocentric compound
5. Faroe Islands (wd:L254096-F1)
6. flag of the Faroe Islands, also known as Faroe Islands flag, the Faroe Islands flag, Merkið, flag of Faroe Islands, Faroese flag (wd:Q4575): national flag of the Faroe Islands, instance of national flag
7. Faroese, also known as Faroese people, Faroe Islands residents, Faroe Islanders, Faeroes, Faeroese (wd:Q223179)
8. Faroe Islands Cup (wd:Q899180): men's national association football tournament in the Faroe Islands, instance of national association football cup
9. Hov, also known as Hov, Faroe Islands (wd:Q1025136): settlement on Suduroy, Faroe Islands, instance of human settlement
10. geography of the Faroe Islands, also known as atlas of the Faroe Islands, Faroe Islands geography, the Faroe Islands geography (wd:Q671799)

[Tool]
Top 10 entity alternatives:
1. Vágatunnilin, also known as Vagatunnilin (wd:Q955238): instance of undersea tunnel, road tunnel

[Tool]
Top 10 entity alternatives:
1. Eysturoyartunnilin, also known as Eysturoy Tunnel (wd:Q27830387): sub-sea tunnel in the Faroe Islands, connecting Runavík and Strendur with Tórshavn, instance of undersea tunnel

[Tool]
Top 10 entity alternatives:
1. Faroe Islands, also known as Färöer, Farre I., Faroes, Faroese Islands, Farre (wd:Q4628): North Atlantic archipelago organized as an autonomous constituent country of the Kingdom of Denmark, instance of autonomous country within the Kingdom of Denmark, instance of electoral unit
2. undersea tunnel, also known as subsea tunnel (wd:Q1317590)
3. Faroe Islands (wd:Q106103102): instance of nomination district, Folketing constituency
4. Faroe Islands (wd:Q103913273): instance of encyclopedia article, encyclopedia article
5. Faroe Islands (wd:L254096): instance of endocentric compound
6. Faroe Islands (wd:L254096-F1)
7. flag of the Faroe Islands, also known as Faroe Islands flag, the Faroe Islands flag, Merkið, flag of Faroe Islands, Faroese flag (wd:Q4575): national flag of the Faroe Islands, instance of national flag
8. Faroese, also known as Faroese people, Faroe Islands residents, Faroe Islanders, Faeroes, Faeroese (wd:Q223179)
9. Faroe Islands Cup (wd:Q899180): men's national association football tournament in the Faroe Islands, instance of national association football cup
10. Hov, also known as Hov, Faroe Islands (wd:Q1025136): settlement on Suduroy, Faroe Islands, instance of human settlement

[Assistant] I'll search for known Faroese tunnel names: Norðoyatunnilin, Sandoyartunnilin, Vága tunnel (Vágatunnilin), Eysturoyartunnilin, and sub-sea tunnels. I'll search for "Norðoyatunnilin" and "Sandoyartunnilin".

[Tool]
Top 10 entity alternatives:
1. Norðoyatunnilin (wd:Q1063368): instance of undersea tunnel, tunnel on the Faroe Islands

[Tool]
Top 10 entity alternatives:
1. Sandoy tunnel, also known as Sandoyartunnilin (wd:Q1256043): road tunnel under the sea, Faroe Islands, instance of undersea tunnel, instance of road tunnel

[Assistant] Now I have several tunnel items. I'll list them by searching for items that are instance of tunnel or are located in the Faroe Islands and are tunnels. I'll try to find all tunnels located in the Faroe Islands by querying items with instance of (wdt:P31) undersea tunnel or road tunnel and located in Faroe Islands (wd:Q4628). I'll use an initial SPARQL SELECT to find tunnels with ?tunnel wdt:P31/wdt:P279 ?type and located in the Faroe Islands (wdt:P17 country or maybe located in or located on?) Need to consider properties: location (P276), country (P17), located in the administrative territorial entity (P131). For infrastructure, often country is P17. Let's search for items that are instance of (P31) undersea tunnel (wd:Q1317590) or road tunnel (wd:Q12280?) Need to find 'road tunnel' entity.

[Tool]
Top 10 entity alternatives:
1. Beaucatcher Tunnel, also known as tunnel road tunnel (wd:Q28185779): tunnel in Asheville, North Carolina, United States, instance of state highway, instance of road tunnel, instance of road
2. Connecticut Route 533, also known as Cider Mill Road, Tunnel Road, Route 533, Cindermill Road, Lake Street (wd:Q30634037): instance of road
3. road tunnel, also known as vehicular tunnel (wd:Q2354973)
4. Tunnel Road (wd:Q106714136): print by Mallette Dean, 1939, instance of print
5. Road tunnel (wd:Q113359168): instance of tunnel
6. Gotthard Road Tunnel (wd:Q684927): road tunnel in Switzerland, instance of road tunnel
7. Fréjus Road Tunnel, also known as Frejus Road Tunnel (wd:Q1968580): highway tunnel between France and Italy, instance of international tunnel, instance of road tunnel, instance of toll tunnel
8. Arlberg Road Tunnel (wd:Q669602): instance of base tunnel, architectural structure, instance of road tunnel
9. Gimry Tunnel, also known as Gimry road tunnel (wd:Q893053): instance of road tunnel, tunnel in Russia
10. Tauern Road Tunnel (wd:Q432033): highway tunnel in Austria, instance of road tunnel, instance of base tunnel

[Assistant]
I'll query for items in Faroe Islands with instance of undersea tunnel or road tunnel. I'll craft a SPARQL query to find tunnels whose country is Faroe Islands (wdt:P17 wd:Q4628) or located in administrative territorial entity (P131) under Faroe Islands or with 'located in the Faroe Islands' (P276? no). To be safe, match items that have 'located in the administrative territorial entity' (P131) or 'country' (P17) or 'located on street' maybe. But easier: search for items that have 'located in the administrative territorial entity' somewhere in Faroe Islands or 'country' Faroe Islands or 'located in' P276 some place in Faroe Islands. I'll just query where ?tunnel wdt:P31 ?type and ( ?tunnel wdt:P17 wd:Q4628 OR ?tunnel wdt:P131* ?adm where ?adm is in Faroe?) QLever may not support property path to P131*? But we can check both P17 and P131. Also ensure ?type is subclass of tunnel (wd:Q44377) or undersea tunnel (wd:Q1317590). Better to search for items that are instance of any subclass of tunnel: ?type wdt:P279* wd:Q44377. Use property path P279* to include subclasses. QLever likely supports property path.

Let's execute query to get tunnels with country Faroe Islands or P131 Faroe Islands. Include labels. Also list known tunnel items.
I'll run a SPARQL query to find items that are instance of a subclass of "tunnel" and are located in or have country Faroe Islands. I'll request labels and items.

[Tool]
Got 29 rows and 4 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | type                          | typeLabel            |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          |
| ...                                | ...                      | ...                           | ...                  |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     |

[Tool]
Top 10 property alternatives:
1. date of official opening, also known as launched, launch date, officially opened on, official opening, official opening time (wd:P1619 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): date or point in time a place, organization, or event officially opened, subproperty of start time, subproperty of inception
2. officially opened by, also known as inaugurated by, opened by (wd:P542 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): person that officially opened the event or place
3. inception, also known as inception date, founding date, founded in, founded on date, founded on (wd:P571 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): time when an entity begins to exist; for date of official opening use P1619, subproperty of start time
4. opening time, also known as hour opens, open hour, opening hour, opens at (wd:P8626 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): time when an establishment or attraction opens, qualifier for P3025
5. image of entrance, also known as door image, image of entry, image of entrance, image of access point, gate image (wd:P9721 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): view of an entry point of an architectural structure, vehicle, t... space, in the entering direction (not in the exiting direction), subproperty of image
6. retrieved, also known as reference date, retrieved at, retrieved date, time of retrieval, viewed on (wd:P813 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): date or point in time that information was retrieved from a database or website (for use in online sources), subproperty of point in time
7. open days, also known as days open, opening days, open on days (wd:P3025 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): days in the week subject item is open within the opening season
8. open period from, also known as opening day of the year, opening month, opening season, start of opening season, start opening season (wd:P3027 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): qualifier to P3025 (open days) for season when open days apply
9. announcement date, also known as date teased, made public on, public announcement date, published, released (wd:P6949 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): time of the first public presentation of a subject by the creator, of information by the media, subproperty of point in time
10. open period to, also known as end of opening season, open until, end opening season (wd:P3028 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): qualifier to P3025 (open days) for season when open days apply

[Tool]
Top 10 property alternatives:
1. clearance, also known as span height, air draught, height of deck bottom, height above water, height above valley floor (wd:P2793 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): distance between surface under bridge and bottom of a bridge deck
2. height, also known as depth over terrain, heighth, size (wd:P2048 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): vertical length of an entity, subproperty of length
3. elevation above sea level, also known as elevation, MASL, MAMSL, height, elevation above mean sea level (wd:P2044 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): height of the item (geographical object) as measured relative to sea level
4. properties for this type, also known as has property, properties for this class, property for this class, property for this type, suggested properties for this instance (wd:P1963 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): when this subject is used as object of “instance of”, the following properties normally apply
5. property, also known as allowed qualifier (wd:P2306 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): qualifier to define a property constraint in combination with P2...traint), or to limit the scope of Q44292881 (wikidata statement)
6. Wikidata property, also known as has property, main property, property, property for this item (wd:P1687 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): main Wikidata property for this item
7. characteristic of, also known as quality of, property of, of, inheres in (wd:P13044 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): (qualifier only) statement value is a characteristic, quality, property, or state of this qualifier value
8. height of center of mass, also known as centre of gravity height, centre of mass height, CG height, CGZ, height of centre of mass (wd:P8497 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): distance between the center of gravity and the bottom of this object
9. Wikidata property example for properties, also known as example for properties, property example (wd:P2271 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): examples of using a property in an item statement, subproperty of Wikidata property example
10. Wikidata property example, also known as example of property, Wikidata property sample, property sample, property example, for example (wd:P1855 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): example where this Wikidata property is used; target item is one...ualifier the property being described given the associated value

[Tool]
Top 10 property alternatives:
1. duration, also known as timespan, era, time span, time length, time interval (wd:P2047 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): length of time of an event or process
2. length, also known as dimension, distance, length overall, LOA, long (wd:P2043 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): measured dimension of an object
3. perimeter, also known as boundary length, circumference, coastline (wd:P2547 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): linear distance around the outside of an object
4. properties for this type, also known as has property, properties for this class, property for this class, property for this type, suggested properties for this instance (wd:P1963 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): when this subject is used as object of “instance of”, the following properties normally apply
5. term length of position, also known as position term, time in position, term of position, term length, length of term (wd:P2097 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): length of time in years (unit: Q577) a person (usually a politician) is to serve in a particular position. Do not add bounds., subproperty of duration
6. characteristic of, also known as quality of, property of, of, inheres in (wd:P13044 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): (qualifier only) statement value is a characteristic, quality, property, or state of this qualifier value
7. property, also known as allowed qualifier (wd:P2306 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): qualifier to define a property constraint in combination with P2...traint), or to limit the scope of Q44292881 (wikidata statement)
8. Wikidata property, also known as has property, main property, property, property for this item (wd:P1687 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): main Wikidata property for this item
9. block size, also known as block length (wd:P2599 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): size of block for this block cipher or hash function
10. Wikidata property example for properties, also known as example for properties, property example (wd:P2271 as psv/psn/prn/prv/pqn/p/pq/wdtn/wdt/pqv/ps/pr): examples of using a property in an item statement, subproperty of Wikidata property example

[Assistant] Properties identified: P31 (instance of), P279 (subclass of), P571 (inception), P1619 (date of official opening), P2048 (height), P2043 (length), and for associated islands need to find property linking tunnels to islands — could be 'connects' or 'located on island' maybe 'island' association via 'connects' (P1850? no). Alternatively, find endpoints - 'connects with' maybe P403? Let's inspect one tunnel item to see properties. I'll fetch details for Eysturoyartunnilin (wd:Q27830387) and for Vágatunnilin and Norðoyatunnilin.

[Tool]
Got 25 rows and 4 columns, showing the first 5 and last 5 rows below:
| prop                                 | propLabel                      | value                                       | valueLabel        |
| ------------------------------------ | ------------------------------ | ------------------------------------------- | ----------------- |
| maximum gradient (wd:P2595)          | maximum gradient (en)          | 5 (xsd:decimal)                             |                   |
| length (wd:P2043)                    | length (en)                    | 11240 (xsd:decimal)                         |                   |
| OpenStreetMap relation ID (wd:P402)  | OpenStreetMap relation ID (en) | 12041875                                    |                   |
| Commons category (wd:P373)           | Commons category (en)          | Eysturoyartunnilin                          |                   |
| Google Knowledge Graph ID (wd:P2671) | Google Knowledge Graph ID (en) | /g/11c2kdnz5p                               |                   |
| ...                                  | ...                            | ...                                         | ...               |
| terminus (wd:P559)                   | terminus (en)                  | Runavík (wd:Q754664)                        | Runavík (en)      |
| crosses (wd:P177)                    | crosses (en)                   | Skálafjørður (wd:Q899139)                   | Skálafjørður (en) |
| inception (wd:P571)                  | inception (en)                 | 2020-01-01T00:00:00Z (xsd:dateTime)         |                   |
| date of official opening (wd:P1619)  | date of official opening (en)  | 2020-12-19T00:00:00Z (xsd:dateTime)         |                   |
| coordinate location (wd:P625)        | coordinate location (en)       | POINT(-6.784570 62.075080) (geo:wktLiteral) |                   |

[Assistant] This shows Eysturoyartunnilin has length, inception, date of official opening, terminus, crosses. For islands, terminus places are on islands—Runavík and Tórshavn are on Eysturoy and Streymoy maybe. To get islands associated, we can get the islands of the termini via P131 or 'located on island' property. For each tunnel, we can get 'terminus' (P559) or 'connects' (P2343?) We should inspect other tunnels to see consistent properties: length P2043, height P2048, inception P571, date of official opening P1619, and maybe 'located on island' via 'located in the administrative territorial entity' for terminus. We'll build a SPARQL query that for each tunnel in Faroe Islands returns: instance of / subclass of (P31 and optionally P279 chain), inception P571, date of official opening P1619, height P2048, length P2043, and associated islands — we'll get islands by: any terminus P559 that has P131 (located in administrative territorial entity) or is located on island via 'located on island' (property P706? No that's 'located on mammal'...). Better approach: for each tunnel, find places connected: terminus (P559) or 'connects' (P2343?) Let's check properties for Vágatunnilin.

[Tool]
Got 19 rows and 4 columns, showing the first 5 and last 5 rows below:
| prop                                | propLabel                      | value                                       | valueLabel         |
| ----------------------------------- | ------------------------------ | ------------------------------------------- | ------------------ |
| height (wd:P2048)                   | height (en)                    | 4.6 (xsd:decimal)                           |                    |
| width (wd:P2049)                    | width (en)                     | 10 (xsd:decimal)                            |                    |
| length (wd:P2043)                   | length (en)                    | 4940 (xsd:decimal)                          |                    |
| OpenStreetMap relation ID (wd:P402) | OpenStreetMap relation ID (en) | 16235225                                    |                    |
| Structurae structure ID (wd:P454)   | Structurae structure ID (en)   | 20010968                                    |                    |
| ...                                 | ...                            | ...                                         | ...                |
| country (wd:P17)                    | country (en)                   | Faroe Islands (wd:Q4628)                    | Faroe Islands (en) |
| state of use (wd:P5817)             | state of use (en)              | in use (wd:Q55654238)                       | in use (en)        |
| inception (wd:P571)                 | inception (en)                 | 2002-01-01T00:00:00Z (xsd:dateTime)         |                    |
| date of official opening (wd:P1619) | date of official opening (en)  | 2002-12-10T00:00:00Z (xsd:dateTime)         |                    |
| coordinate location (wd:P625)       | coordinate location (en)       | POINT(-7.075300 62.106900) (geo:wktLiteral) |                    |

[Assistant]
Vágatunnilin has length and height, and country P17. Good.

Now, to get islands associated with each tunnel: tunnels may have 'connects' or 'terminus' properties—Eysturoyartunnilin has terminus P559 with Runavík and Tórshavn. We can get the island of those terminus towns using P131 or 'island' P706? Let's inspect Runavík (wd:Q754664).

[Tool]
Got 29 rows and 4 columns, showing the first 5 and last 5 rows below:
| prop                                                       | propLabel                                             | value                                       | valueLabel                |
| ---------------------------------------------------------- | ----------------------------------------------------- | ------------------------------------------- | ------------------------- |
| elevation above sea level (wd:P2044)                       | elevation above sea level (en)                        | 0 (xsd:decimal)                             |                           |
| population (wd:P1082)                                      | population (en)                                       | 584 (xsd:decimal)                           |                           |
| Facebook location ID (wd:P1997)                            | Facebook location ID (en)                             | 108701535821749                             |                           |
| Who's on First ID (wd:P6766)                               | Who's on First ID (en)                                | 1125910725                                  |                           |
| GeoNames ID (wd:P1566)                                     | GeoNames ID (en)                                      | 2614402                                     |                           |
| ...                                                        | ...                                                   | ...                                         | ...                       |
| located in the administrative territorial entity (wd:P131) | located in the administrative territorial entity (en) | Runavík Municipality (wd:Q969578)           | Runavík Municipality (en) |
| capital of (wd:P1376)                                      | capital of (en)                                       | Runavík Municipality (wd:Q969578)           | Runavík Municipality (en) |
| different from (wd:P1889)                                  | different from (en)                                   | Runavík Municipality (wd:Q969578)           | Runavík Municipality (en) |
| inception (wd:P571)                                        | inception (en)                                        | 1916-01-01T00:00:00Z (xsd:dateTime)         |                           |
| coordinate location (wd:P625)                              | coordinate location (en)                              | POINT(-6.719167 62.109444) (geo:wktLiteral) |                           |

[Assistant] Runavík is in Runavík Municipality. To get the island, we need to follow P131 up to municipality and then P131 up to island? For Faroese towns, municipalities are on islands; perhaps municipality has 'island' property P706? Let's inspect Runavík Municipality.

[Tool]
Got 24 rows and 4 columns, showing the first 5 and last 5 rows below:
| prop                                                       | propLabel                                             | value                                          | valueLabel                             |
| ---------------------------------------------------------- | ----------------------------------------------------- | ---------------------------------------------- | -------------------------------------- |
| area (wd:P2046)                                            | area (en)                                             | 99.9 (xsd:decimal)                             |                                        |
| population (wd:P1082)                                      | population (en)                                       | 4211 (xsd:decimal)                             |                                        |
| iNaturalist place ID (wd:P7471)                            | iNaturalist place ID (en)                             | 30240                                          |                                        |
| postal code (wd:P281)                                      | postal code (en)                                      | FO 620                                         |                                        |
| Freebase ID (wd:P646)                                      | Freebase ID (en)                                      | /m/0_qg2rk                                     |                                        |
| ...                                                        | ...                                                   | ...                                            | ...                                    |
| capital (wd:P36)                                           | capital (en)                                          | Runavík (wd:Q754664)                           | Runavík (en)                           |
| instance of (wd:P31)                                       | instance of (en)                                      | municipality of the Faroe Islands (wd:Q856079) | municipality of the Faroe Islands (en) |
| replaces (wd:P1365)                                        | replaces (en)                                         | Funnings Municipality (wd:Q946445)             | Funnings Municipality (en)             |
| located in the administrative territorial entity (wd:P131) | located in the administrative territorial entity (en) | Eysturoy (wd:Q994274)                          | Eysturoy (en)                          |
| coordinate location (wd:P625)                              | coordinate location (en)                              | POINT(-6.722500 62.117200) (geo:wktLiteral)    |                                        |

[Assistant] Runavík Municipality has P131 pointing to Eysturoy (wd:Q994274). So we can get island by following P131 chain from terminus to island (which is instance of island). For terminals listed, get their P131 chain until reaching an item that is instance of island (wd:Q23442 maybe?). Let's find the item for island entity. Search 'island'.

[Tool]
Top 10 entity alternatives:
1. island, also known as islands, isle (wd:Q23442)
2. Island Records, also known as Island, LC 00407, LC 0407 (wd:Q190585): British-Jamaican record label, instance of record label
3. The Island, also known as Island (wd:Q224069): 2005 film directed by Michael Bay, instance of film
4. Island (wd:Q128651): instance of commune of France, commune in Yonne, France
5. Island, also known as Island, Kentucky, Island, KY (wd:Q2348689): instance of city in the United States, city in Kentucky, United States
6. The Island, also known as Island, Ostrov (wd:Q1113702): 2006 film directed by Pavel Lungin, instance of film
7. Island (wd:Q2419461): 1962 novel by Aldous Huxley, instance of literary work
8. The Island, also known as Island (wd:Q1453852): 1980 film directed by Michael Ritchie, instance of film
9. Island (wd:Q23540774): 2016 video game developed by Front Wing, instance of video game
10. Island (wd:Q108735969): 2022 South Korean web series, instance of web series

[Assistant]
So islands are wd:Q23442. We'll write a query to gather tunnels with country Faroe Islands. For each tunnel, we'll return its instance of (P31) value (the direct type), and possibly its subclass chain? The user asked "what it is an instance or subclass of" — ambiguous: maybe list P31 and P279 classes. We can include both P31 and P279 (subclass of for the type?) But rule 4: query should return identifiers of items. So include ?instance (P31) and optionally ?subclass (P279) for the instance's subclass chain? Better include both: the item might have P31 = undersea tunnel (wd:Q1317590) which itself is subclass of tunnel. We can include ?type = P31 value and optionally its P279 chain? The user asked "what it is an instance or subclass of" — I'll return both P31 and any P279* ancestors of that type. So include ?instance and ?instanceSubclass ?instSubclassLabel maybe with P279* to wd:Q44377. But to not overcomplicate, for each tunnel list its direct instance (P31) and also optionally the superclass chain via P31/wdt:P279* ?super. But ensure no SERVICE wikibase:label usage.

Next, collect P571, P1619, P2048, P2043. For islands, we'll get terminus P559 or 'connects' property? Let's look at other tunnels—some have 'terminus' P559, some 'crosses' P177, some 'connects' P2343? We'll search for properties used by tunnels to indicate endpoints. Let's inspect a few more tunnel items for 'terminus' property presence. We saw Eysturoyartunnilin had terminus. Vágatunnilin didn't show terminus rows but has coordinates only. Norðoyatunnilin inspect.

[Tool]
Got 6 rows and 4 columns:
| tunnel                            | tunnelLabel             | terminus               | terminusLabel  |
| --------------------------------- | ----------------------- | ---------------------- | -------------- |
| Norðoyatunnilin (wd:Q1063368)     | Norðoyatunnilin (en)    |                        |                |
| Sandoy tunnel (wd:Q1256043)       | Sandoy tunnel (en)      | Gamlarætt (wd:Q369927) | Gamlarætt (en) |
| Eysturoyartunnilin (wd:Q27830387) | Eysturoyartunnilin (en) | Strendur (wd:Q1025132) | Strendur (en)  |
| Eysturoyartunnilin (wd:Q27830387) | Eysturoyartunnilin (en) | Hvítanes (wd:Q603859)  | Hvítanes (en)  |
| Eysturoyartunnilin (wd:Q27830387) | Eysturoyartunnilin (en) | Runavík (wd:Q754664)   | Runavík (en)   |
| Vágatunnilin (wd:Q955238)         | Vágatunnilin (en)       |                        |                |

[Assistant]
Not all tunnels have terminus info. Another way: islands associated with tunnel could be derived by checking P17 (country) — but that doesn't give island. Maybe some tunnels have 'located on island' property P706? Let's search for any direct property linking tunnel to island with object being one of the Faroe Islands items. We'll query for ?tunnel wdt:P31 tunnel and ?tunnel ?p ?island where ?island is instance of island (wd:Q23442). But that's risky.

Instead, for each tunnel, we can try to get the islands by getting any 'terminus' or 'crosses' or 'located in the administrative territorial entity' chain to reach island entities. Approach: for each tunnel, get any ?place where ?tunnel wdt:P559|wdt:P177|wdt:P276 ?place. For each ?place, follow P131* to reach a place that is instance of island (wd:Q23442). Also include direct P131 if ?tunnel has P131 pointing to an island (unlikely). Let's craft a SPARQL that finds tunnels where country is Faroe Islands and then fetch P31 type, P571, P1619, P2048, P2043, and get islands via optional path: ?tunnel (wdt:P559|wdt:P177|wdt:P276|wdt:P131)? Let's include terminus (P559), crosses (P177), location (P276), and 'starts at' (P2317?) But we saw P559 and P177 are used. We'll include union of these properties. Then from ?place, get ?place p131* ?island where ?island wdt:P31 wd:Q23442. Use property path p131* means P131 repeated. But be careful: we must use direct claims property names in SPARQL like wdt:P131. So property path: ?place wdt:P131* ?island . That should work.

Let's build the SPARQL query selecting tunnels where country is Faroe Islands OR located in administrative territorial entity is a municipality in Faroe Islands? Simpler: items whose P17 is Faroe Islands OR located in administrative territorial entity (P131) somewhere whose P17 is Faroe Islands — but earlier we found 29 items with P17/P131 wd:Q4628. Let's reuse that filter: ?tunnel wdt:P17 wd:Q4628 OR ?tunnel wdt:P131 wd:Q4628.

We'll write query:

SELECT DISTINCT ?tunnel ?tunnelLabel ?instance ?instanceLabel ?inception ?officialOpening ?height ?length ?island ?islandLabel
WHERE {
  ?tunnel wdt:P31 ?instance .
  ?instance wdt:P279* wd:Q44377 .  # ensure it's a type of tunnel
  { ?tunnel wdt:P17 wd:Q4628 } UNION { ?tunnel wdt:P131 wd:Q4628 }
  OPTIONAL { ?tunnel wdt:P571 ?inception. }
  OPTIONAL { ?tunnel wdt:P1619 ?officialOpening. }
  OPTIONAL { ?tunnel wdt:P2048 ?height. }
  OPTIONAL { ?tunnel wdt:P2043 ?length. }
  OPTIONAL {
    { ?tunnel wdt:P559|wdt:P177|wdt:P276|wdt:P131 ?place . }
    ?place wdt:P131* ?island .
    ?island wdt:P31 wd:Q23442 .
    OPTIONAL { ?island rdfs:label ?islandLabel FILTER(LANG(?islandLabel) = "en") }
  }
  OPTIONAL { ?tunnel rdfs:label ?tunnelLabel FILTER(LANG(?tunnelLabel) = "en") }
  OPTIONAL { ?instance rdfs:label ?instanceLabel FILTER(LANG(?instanceLabel) = "en") }
}

Order by ?tunnelLabel ?islandLabel.

Let's run it.

[Tool]
Got 29 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Assistant]
The island column is empty for many rows — my method didn't find islands because many tunnels don't have terminus/crosses/location entries. For those, maybe we can find the islands by looking at "coordinate location" and reverse geocoding to find the island — but that's beyond SPARQL.

Alternative: find all tunnels in Faroe Islands and for each, get any 'located in the administrative territorial entity' chain leading to an island. Many tunnels may have P131 pointing to a municipality or island, but earlier filter for ?tunnel wdt:P131 wd:Q4628 was narrow. Let's query all tunnels where any P131* ancestor is on island. Eg: ?tunnel wdt:P131* ?island where ?island wdt:P31 wd:Q23442. That could catch tunnels that are located within municipalities that are located in islands. Let's run query to find ?tunnel where ?tunnel wdt:P131* ?island . Also ensure ?instance is subclass of tunnel and country Faroe Islands P17 wd:Q4628. We'll allow P17 or not? To limit to Faroe Islands, require P17 wd:Q4628. Let's run:

?tunnel wdt:P17 wd:Q4628 ; wdt:P31 ?instance . ?instance wdt:P279* wd:Q44377 .

OPTIONAL { ?tunnel wdt:P131* ?island . ?island wdt:P31 wd:Q23442 . }

Run this.

[Tool]
Got 29 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Tool] Got no rows and 6 columns

[Tool] Got no rows and 4 columns

[Tool]
Got 154 rows and 3 columns, showing the first 10 rows below:
| subject                           | property                       | object                                                                              |
| --------------------------------- | ------------------------------ | ----------------------------------------------------------------------------------- |
| Eysturoyartunnilin (wd:Q27830387) | instance of (wdt:P31)          | undersea tunnel (wd:Q1317590)                                                       |
| Eysturoyartunnilin (wd:Q27830387) | country (wdt:P17)              | Faroe Islands (wd:Q4628)                                                            |
| Eysturoyartunnilin (wd:Q27830387) | coordinate location (wdt:P625) | POINT(-6.784570 62.075080) (geo:wktLiteral)                                         |
| Eysturoyartunnilin (wd:Q27830387) | Commons category (wdt:P373)    | Eysturoyartunnilin                                                                  |
| Eysturoyartunnilin (wd:Q27830387) | image (wdt:P18)                | <http://commons.wikimedia.org/wiki/Special:FilePath/Karte%20Eysturoyartunnilin.svg> |
| Eysturoyartunnilin (wd:Q27830387) | inception (wdt:P571)           | 2020-01-01T00:00:00Z (xsd:dateTime)                                                 |
| Eysturoyartunnilin (wd:Q27830387) | significant event (wdt:P793)   | start of construction (wd:Q27136782)                                                |
| Eysturoyartunnilin (wd:Q27830387) | length (wdt:P2043)             | 11240 (xsd:decimal)                                                                 |
| Eysturoyartunnilin (wd:Q27830387) | connects with (wdt:P2789)      | Streymoy (wd:Q192540)                                                               |
| Eysturoyartunnilin (wd:Q27830387) | state of use (wdt:P5817)       | in use (wd:Q55654238)                                                               |
| ...                               | ...                            | ...                                                                                |

[Tool]
Got 30 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Assistant] I'll run a final SPARQL query that returns all tunnels in the Faroe Islands (country = wd:Q4628), their direct instance (P31) and instance superclasses (P279*), inception (P571), official opening date (P1619), start time (P580), height (P2048), length (P2043), and associated islands found via terminus/connects/crosses/location/administrative entity links. I will return identifiers and English labels (labels are optional). Now I'll execute the query.

[Tool]
SPARQL execution failed:
HTTPSConnectionPool(host='qlever.cs.uni-freiburg.de', port=443): Read timed out. (read timeout=30)

[Assistant] The previous query timed out; I'll simplify the query to be less heavy by removing instanceSuper retrieval and some optional patterns. I'll run a simpler query to select tunnels with basic properties and islands derived from place P559 or P2789 or P177 or P276 or P131's P131 chain.

[Tool]
Got 30 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Tool]
Got 313 rows and 3 columns, showing the first 10 rows below:
| subject               | property                                                    | object                                                                                |
| --------------------- | ----------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
| Streymoy (wd:Q192540) | instance of (wdt:P31)                                       | island (wd:Q23442)                                                                                |
| Streymoy (wd:Q192540) | country (wdt:P17)                                           | Faroe Islands (wd:Q4628)                                                                                |
| Streymoy (wd:Q192540) | located in the administrative territorial entity (wdt:P131) | Kvívík Municipality (wd:Q548364)                                                                                |
| Streymoy (wd:Q192540) | coordinate location (wdt:P625)                              | POINT(-7.019444 62.131667) (geo:wktLiteral)                                                                       |
| Streymoy (wd:Q192540) | Commons category (wdt:P373)                                 | Streymoy                                                                                |
| Streymoy (wd:Q192540) | image (wdt:P18)                                             | <http://commons.wikimedia.org/wiki/Special:FilePath/Sk%C3%A6lingsfjall%2C%20Streymoy%20%28faroe%20islands%29.jpg> |
| Streymoy (wd:Q192540) | part of (wdt:P361)                                          | Faroe Islands (wd:Q4628)                                                                                |
| Streymoy (wd:Q192540) | population (wdt:P1082)                                      | 22400 (xsd:decimal)                                                                                |
| Streymoy (wd:Q192540) | located in time zone (wdt:P421)                             | UTC±00:00 (wd:Q6574)                                                                                |
| Streymoy (wd:Q192540) | native label (wdt:P1705)                                    | Streymoy (fo)                                                                                |
| ...                   | ...                                                         | ...                                                                                |

[Tool]
Got 30 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Assistant] I will run the final SPARQL query that lists items in Wikidata that are instances (P31) of (subclasses of) tunnel and have country Faroe Islands (P17=wd:Q4628). For each tunnel I'll retrieve its P31 type, inception (P571), date of official opening (P1619), height (P2048), length (P2043), and any associated island found by following place/terminus/connects links to an island (wd:Q23442). I'll execute the query now to get the full results.

[Tool]
Got 30 rows and 10 columns, showing the first 5 and last 5 rows below:
| tunnel                             | tunnelLabel              | instance                      | instanceLabel        | inception                           | officialOpening                     | height            | length             | island | islandLabel |
| ---------------------------------- | ------------------------ | ----------------------------- | -------------------- | ----------------------------------- | ----------------------------------- | ----------------- | ------------------ | ------ | ----------- |
| wd:Q97924573                       |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2021-01-01T00:00:00Z (xsd:dateTime) | 2021-05-08T00:00:00Z (xsd:dateTime) |                   | 2050 (xsd:decimal) |        |             |
| wd:Q112874562                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| wd:Q56199617                       |                          | tunnel (wd:Q44377)            | tunnel (en)          | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 220 (xsd:decimal)  |        |             |
| wd:Q125772433                      |                          | road tunnel (wd:Q2354973)     | road tunnel (en)     |                                     |                                     |                   |                    |        |             |
| Árnafjarðartunnilin (wd:Q21814506) | Árnafjarðartunnilin (en) | tunnel (wd:Q44377)            | tunnel (en)          | 1965-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.1 (xsd:decimal) | 1680 (xsd:decimal) |        |             |
| ...                                | ...                      | ...                           | ...                  | ...                                 | ...                                 | ...               | ...                | ...    | ...         |
| Sumbiartunnilin (wd:Q19391107)     | Sumbiartunnilin (en)     | tunnel (wd:Q44377)            | tunnel (en)          | 1997-01-01T00:00:00Z (xsd:dateTime) | 1997-01-01T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 3240 (xsd:decimal) |        |             |
| Trøllanes Tunnel (wd:Q56199598)    | Trøllanes Tunnel (en)    | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1985-01-01T00:00:00Z (xsd:dateTime) |                                     | 3.5 (xsd:decimal) | 2248 (xsd:decimal) |        |             |
| Vágatunnilin (wd:Q955238)          | Vágatunnilin (en)        | undersea tunnel (wd:Q1317590) | undersea tunnel (en) | 2002-01-01T00:00:00Z (xsd:dateTime) | 2002-12-10T00:00:00Z (xsd:dateTime) | 4.6 (xsd:decimal) | 4940 (xsd:decimal) |        |             |
| Viðareiðistunnilin (wd:Q26793908)  | Viðareiðistunnilin (en)  | road tunnel (wd:Q2354973)     | road tunnel (en)     | 2016-01-01T00:00:00Z (xsd:dateTime) |                                     |                   | 1939 (xsd:decimal) |        |             |
| Villingardal Tunnel (wd:Q56199355) | Villingardal Tunnel (en) | road tunnel (wd:Q2354973)     | road tunnel (en)     | 1979-01-01T00:00:00Z (xsd:dateTime) | 1979-01-01T00:00:00Z (xsd:dateTime) | 3.4 (xsd:decimal) | 1193 (xsd:decimal) |        |             |

[Assistant]
The query returns 30 tunnels but island info is missing for many. Given time, I'll prepare the final SPARQL query that returns tunnels (items) with the requested properties; island association is included where available via place->P131* to island. I'll present the SPARQL and explain that results may not have island labels for all tunnels because source data may not include terminus/place info.

Now I'll call the answer function with the final SPARQL and a brief answer summarizing that the query returns the tunnels and the properties. I must include the actual SPARQL query and the answer text—should be based on query results. The instructions require to execute final query before giving answer — I did. I should include the results? The answer function expects "answer" string describing the results based on query. I'll state that the query returns 30 tornado/list of tunnels and mention notable ones (Eysturoyartunnilin, Vágatunnilin, Norðoyatunnilin, Sandoyartunnilin). I'll keep concise.

[Tool] Stopped generation process